Mechanical movement



(No Model.) 2 Sheets-Sheet 1.

G. W. THOMAS. MECHANICAL MOVEMENT.

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N. PETERS. nmmm m hur, Washington. a. c

(No Model.) 2 SheetsSheet 2.

G. W. THOMAS.

MEGHANIGAL MOVEMENT.

No. 407,136. Patented July 16, 1889.

WITNESSES: INVENTO'R:

N. PETERS PhaloLflhcgnpber. Wahinginh. n a

NITED STATES ATENT O FICE.

GEORGE V. THOMAS, OF OGALLALA, NEBRASKA.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 407,136, dated July 16, 1889.

Application filed September 24, 1888. Serial No. 286,179. (No model.)

To (0 whom, it may concern.-

Be it known that I, GEORGE V. THOMAS, of Ogallala, in the county of Keith and State of Nebraska, have invented a new and Improved Mechanical Movement, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved mechanical movement specially intended for reversing motion and for applying power in a direct manner throughout the length of the stroke.

The invention consists of certain parts and details and combinations of the same, as will be fully described hereinafter, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a side elevation of the improve ment. Fig. 2 is a sectional end elevation of the same on the line as a; of Fig. 1, and Fig. 3 is a sectional plan view of part of the improvement on the line y y of Fig. 1. Fig. 4 is a top plan view, partly in section, of the improvement.

The improved mechanical movement A is provided with a pitman B, connected with a piston-rod A, operated by steam or other power; or the said pitman B may be connected with other mechanical means for imparting an up-and-down motion to it. Said pitman may also be operated by hand, if necessary. The pitman B is provided with two parallel grooved bars C and 0, between which are formed teeth 0 adapted to be engaged at either side by a gear-wheel D, secured on the main driving-shaft E, mounted to rotate in suitable bearings in the frame F, of any approved construction. 011 the main shaft E is secured,in the usual manner, a fly-wheel G.

Each of the bars C and O is provided in its outer side with a groove C, in which travel the friction-rollers ll and II, respectively, mounted on the crank-disks I and I, of which the latter turns loosely 011 the main drivingshaft E, and the former turns in a bearing F, erected 011 the frame F.

On the outer end of the main driving-shaft E is secured a gear-wheel J, adapted to mesh into the gear-teeth K at the top and bottom,

said gear-teeth K projecting from a segmental wheel L, provided with a shaft L, ha"- ing a ball and mounted in a ball-socket L so as to permit a turning and swinging motion of the said segmental wheel L. O11 the inside of the rim of the segmental wheel L is formed a segmental groove N, closed at each end, and in which travels a friction-roller O, secured 011 the crank-arm l, mounted to turn in the bearing F erected 011 the main frame F.

The operation is as follows: An up-anddown motion is imparted to the pitman B, either by hand or other power, so that the gear-wheel D receives a rotary motion by engaging the teeth O of the said pitman B. The main driving-shaft E is thus rotated in one direction. \Vhen the said pitman B is moved downward and the gear-wheel D is in mesh with the uppermost gear-teeth O then the friction-rollers ll and Il' engage the upper closed ends of the side bars O and C, so that the latter move around the gear-wheel D, whereby the other side of the gear-teeth O come .in contact with the gearvheel D and the upward stroke of the pitman B takes place. IV hen the pitman B is at the end of its upstroke, the friction-rollers II and II are in the lower closed ends of the grooves and carry the pitman again over to the rear of the gear-wheel D. It is understood that the distance of the centers of the fric tion-rollers ll and H from the centers of their disks I and I is equal to the pitch radius of the gear-wheel D. \Vhen the device is in the position shown in Fig. 1 and the pitman B is moved downward, the main driving-shaft E rotates in one direction, and when the pitman B is moved upward while in the position shown in Fig. 1 the main driv ing-shaft E rotates in the opposite direction. It will be seen that the power employed on the pitman B is transmitted to the gear-wheel D on the main driving-shaftE throughout the full stroke of the said pitman, and consequently no lost motion takes place by changing the reciprocating motion to a rotary motion. The rotary motion of themain drivinghen thelast tooth on one end of the said segmental wheel L meshes into said gear-wheel J, then the friction-roller O strikes against the closed end of the segmental groove .N, whereby the said end of the segmental wheel L is swung up or down, (see dotted lines, Fig. 1,) and the gear-Wheel J acts on the under side of the gear-teeth K, consequently turning said segmental gear-wheel L in an opposite direction, thus reversing its motion. The same movement takes place when the last tooth on the other end of the segmental wheel L meshes into the gear-wheel J. The friction-roller 0 then strikes at this end of the groove N and swings the said end of the wheel L up or down, as the case may be. The motion of the segmental wheel L is now again reversed as the said gear-wheel J meshes into the other side of the gear-teeth K. Thus it will be seen that the reversing motion takesv place whenever one end of the segmental wheel L is in contact with the gear-wheel K.

It is understood that the distance between the friction -roller 0 and the center of its 2 5 crank-arm P is equal to the pitch radius of the gear-wheel J. Thus it will be seen that the power applied to the pitman B is utilized equally throughout its stroke and the segmental wheel L is reversed, as above described. The crank-disks I and I serve as guides for the side bars O and C of the pitman B, so as to preventa sidewise motion of the said pitman.

Having thus described my invention, what I 3 5 claim as new, and desire to secure by Letters Patent, is-

1. In a mechanical movement, the combination, with a pitman consisting of two grooved bars and teeth connecting the bars with each other, of a gear-wheel meshing into the said teeth, a main shaft carrying the said gear-wheel, and crank-disks engaging by their crank-pins the grooves in the said bars of the pitman, substantially as shown and described.

nation, with a main driving-shaft and agearwheel secured on the same, of a segmental wheel having gear-teeth adapted to mesh at either side into the said gear-wheel, a shaft carrying the said segmental wheel and mounted to turn and to swing, and a crankarm held in axial line with the said main shaft and carrying friction-rollers engaging a segmental groove in the said segmental wheel, substantially as shown and described.

GEORGE IV. THOMAS.

Witnesses:

J. S. McWILLIAMs, H. CARNAHAN. 

